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3 years ago

Freddie drives his car 10 km North. He stops for gas and then drives 5 km South.

Physics

1 answer:

fgiga [73]3 years ago

4 0

Answer:

5 km

Explanation:

displacement is the straight line distance from a particular point. since north and south are in opposite directions, it means that he has taken a u-turn

thus, 10 - 5 = 5km displacement

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Answer:

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Explanation:

We know,

$\eta=1-\frac{T_2}{T_1}=1-\frac{Q_2}{Q_1}$ ..............(1)

where,

η = Efficiency of the engine

T₁ = Initial Temperature

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Q₁ = Heat available initially

Q₂ = Heat after reaching the temperature T₂

Given:

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$Q_2=3.78\times 10^3\times0.72$

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$\Delta S=\frac{Q_1-Q_2}{T_1}$

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